JPH0331908Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a spacer that holds and moves the multi-strand pipes when piping the multi-strand pipes inside a sheath pipe buried underground. It is.

(Prior Art) In order to bury underground a conduit through which an underground cable or the like is passed, first, a sheath pipe is buried underground, and a multi-strand conduit is inserted into the sheath pipe. These multi-striped conduits are pushed into the sheath from one side or pulled in from the opposite side, but during insertion, the multi-striped conduits are moved while maintaining their respective positions. For ease of installation, spacers with wheels or the like are provided at regular intervals along the multi-line conduits.

(Problem to be solved by the invention) However, conventional spacers are made by drilling a large number of holes in a flat spacer based on a predetermined arrangement of multiple pipes, and passing each pipe through each of these holes and welding. etc., but this method does not allow for changes in pipe size or number of pipes. In addition, since each pipe line is fixed to the spacer as described above, if there are bends in the sheath pipe,
Unable to follow this bend, it gets stuck at that point,
There was a risk that the piping would be hindered.

(Means for solving the problems) This idea was made in view of these points, and it is a spacer that can arrange multiple pipes at any position on site, and also provides a spacer with multiple conduits. The structure is such that each conduit in the strip is supported in a movable manner.

The concrete structure is such that one end of each arm is detachably fixed at intervals to the periphery of a ring-shaped main body, and the other end of each arm located inside the main body is used for built-in cables. Each of these short tubes is made up of two half-tubes that are joined together by bolts and nuts, and is supported by a support section provided on the outer periphery of the short tube into which each of the multi-striped conduits is inserted and held. , impact-absorbing guide rollers are provided at appropriate locations on the main body.

(Function) The two half pipes constituting each short pipe of the spacer of this invention cover the conduit for built-in cables, and are tightened with bolts and nuts to fix each conduit within each short pipe. The other end of the arm, which is swingably supported at one end of each short tube, is removably fixed to the outer periphery of the main body by adjusting the arrangement of each of the multiple pipes. In this way, the spacers of this invention are sequentially attached to the multiple ducts at regular intervals while the multiple ducts are inserted into the sheath tube. At this time, shock-absorbing guide rollers provided on the outer periphery of the main body of each spacer rotate to smoothly transport the conduit within the sheath tube. When the sheath tube is bent, each short tube supported at the tip of each arm tilts in accordance with the bend of the sheath tube, and the spacer moves smoothly within the sheath tube. Furthermore, even if the sheath tube passes through a location where the connection portion is misaligned, the guide rollers absorb these displacements and stably support the conduit.

(Example) An example of this invention will be described below with reference to the drawings.
Reference numeral 1 denotes a chainel-shaped ring-shaped main body having an outer edge 1a and an inner edge 1b, 2, 2 are extendable long arms,
One end of these long arms 2 is connected to the ring-shaped main body 1.
It is removably fixed to. As shown in FIG. 3, reference numeral 3 denotes a U-shaped locking portion that opens at one end of each long arm 2 at right angles to the longitudinal direction, and the main body 1 is attached to one side of this U-shaped locking portion 3. The outer edge 1a is included. Reference numeral 4 indicates a holding piece having a triangular cross section and provided within this U-shaped locking portion 3, and reference numeral 5 indicates an insertion piece 5a and a pressing piece 5b.
The insertion piece 5a of the key-shaped operation piece 5 is inserted between the outer edge 1a of the main body 1 and the clamping piece 4, and the pressing piece 5b is inserted into the U-shaped locking part 3. It faces an inner edge 3a provided on the outer wall. Reference numeral 6 denotes a tightening bolt which is screwed into a screw hole (not shown) drilled in this inner edge 3a and can freely press the pressing piece 5b.By tightening this tightening bolt 6, the pressing piece 5b is
is pressed, the insertion piece 5a is pressed and inserted between the clamping piece 4 and the outer edge 1a, and the outer edge 1a of the ring-shaped main body 1 is pressed.
is held between one side wall of the U-shaped locking portion 3 and the insertion piece 5a, thereby fixing the long arm 2 to the ring-shaped main body 1. 7 is a locking nut screwed onto the tightening bolt 6; 8 is a length adjuster for the long arm 2; It consists of an arm tip piece 2a that overlaps with this projecting piece 10, and a bolt and nut 11 that pass through this arm tip piece 20 and loosely pass through the elongated hole 9, and when the bolt and nut 11 are tightened, Adjusting the length of the arm tip piece 2a protruding from the tip of the long arm 2,
Can be fixed. Reference numeral 12 denotes a pair of gripping pieces, one of which is fixed to the arm tip piece 2a, and the tip of each of the pair of gripping pieces 12 has a spherical groove. 1
3 and 13 are bolts and nuts that integrate these pair of grip pieces 12, 14 are two half pipes 14a,
14a is a short pipe, 15 is each of these half pipes 1
The spherical protrusion 15 is a spherical protrusion protruding from the outer periphery of the spherical protrusion 4a, and the spherical groove of each of the pair of gripping pieces 12 covers the outer periphery of the spherical protrusion 15. And the above bolt, nut 13
By adjusting the tightening, the spherical protrusion 15 is universally rotatable within the spherical groove of the pair of gripping pieces 12. 16, 16 are the two half pipes 14a,
These are bolts and nuts that are passed between the opposing outer edges of 14a to integrate and tighten them. As shown in FIG. 1, this short tube 14 is located at the center of the ring-shaped main body 1, and is supported by two long arms 2, 2 whose ends are supported on both sides of the main body 1.

Numeral arms 18 have one end removably attached to the outer periphery of the ring-shaped body 1 and the other end protruding inward of the ring-shaped body 1. The locking portion of each arm 18 to the ring-shaped body 1 is as described above. It has the same structure as the locking part of the long arm. Reference numeral 19 denotes a pair of gripping pieces provided at the inner end of each arm 18, and each of these gripping pieces 1
Reference numeral 9 has the same structure as the above-mentioned gripping piece 12, and includes a bolt and a nut 20 that are integrated and tightened. 21 is a short tube supported by the gripping piece 19 of each of these arms 18, and each of these short tubes 21 has a spherical protrusion 22 only on one of the half tubes 21a, 21a.
These half tubes 21a, 21a are integrally connected with bolts and nuts 23. A spherical protrusion 22 of the short tube 21 is rotatably supported by each pair of gripping pieces 19.

24 is a shock-absorbing guide roller provided below the ring-shaped main body 1; 25 is a rectangular frame of each guide roller 24;
A middle plate 25b is provided horizontally in the hollow portion 25a of No.5. 26 is the middle plate 25b of this frame 25
and a support shaft loosely passed through a hole in the lower plate 25c, 2
7 is a channel groove type bearing stand provided at the end of the support shaft 26 projecting outward from the frame 25; 28;
30 is a channel groove type bearing provided at the other end of the column 28, and 31 is a columnar body with one end pivotally supported within the bearing stand 27 via a pin 29. 30 is a roller pivotally supported by a pin 32, 33 is a support shaft 26 that projects upwardly from the middle plate 25b in the frame 25, and a nut 34 is screwed onto the end of the support shaft 26, which is attached to the middle plate 25 in this frame 25.
b and the flange fixed to the support shaft 26 between the lower plate 25c, 35 is the middle plate 25b and the flange 34
The springs 36 and 36 are mounting pieces protruding in parallel from one end of the frame 25, and the springs 37 and 37 are screwed onto each of these mounting pieces 36. Insert the ring-shaped main body 1 between these mounting pieces 36 and 36 with bolts that pass through the bolts 37 and 37.
By tightening, each shock absorbing guide roller 24 is fixed to the main body 1.

In this embodiment, as shown in FIG.
0, when inserting the multi-strand conduit 41 containing the cable, one end of the sheath tube 40 is inserted into each conduit 4
1 into each of the short tubes 14 and 21, and tighten the bolts and nuts 16 and 23 to close each of the short tubes 14 and 2.
Each conduit 41 is fixed within 1. Then, the long arms 2 or arms 18 are arranged and attached to the outer periphery of the ring-shaped main body 1 according to the number and arrangement of the multiple pipes 41 to be inserted, and the spherical protrusions 15 of each of the short pipes 14 and 21 are attached. and 22 are movably supported by the gripping pieces 12 and 19 at the tip of the long arm 2 or arm 18.

To attach the long arm 2 and the arm 18 to the ring-shaped main body 1, the U-shaped locking part 3 is hooked onto the outer edge 1a of the ring-shaped main body 1, and when the tightening bolt 6 is tightened, the key-shaped operating piece 5 is attached to the ring-shaped main body 1. It penetrates deeply into the mold locking part 3 and connects the outer periphery of the U-shaped locking part 3 and this key-shaped working piece 5.
The outer edge 1a is held between the long arms 2 and the arms 18, and the long arms 2 and the arms 18 are strongly fixed to the ring-shaped main body 1.
In this way, the spacer of this invention is attached to the multi-line conduit 41, and while spacers are attached to the conduit 41 at regular intervals in the same manner as described above, the conduit 41 is inserted together with the spacer into the sheath tube 40. go.
And each of these spacers has a ring-shaped body 1
Shock-absorbing guide roller 2 installed on the lower outer periphery of
4 comes into contact with the inner periphery of the sheath tube 40, rotates the roller 31, and moves. As a result, the multi-line pipe 41
are kept at a distance from each other, are supported by spacers after a certain length, and are smoothly conveyed within the sheath tube 40.
At this time, each of the short tubes 14 and 21 is movably supported by the gripping pieces 12 and 19 at the tip of the long arm 2 or the arm 18, so that even in a place where the sheath tube 40 is bent, it can be held against the ring-shaped main body 1. Short pipes 14 and 2
1 is tilted and can be transported smoothly. Also, the sheath tube 41
Even if there are some level differences at the connection part, the impact-absorbing guide rollers 24 absorb these level differences and do not apply impact to the conduit 41, the long arm 2, or the arm 18. That is, the support shaft 26 of the roller 31 of the guide roller 24 is always urged outward by a spring 35, and is in the state shown in FIG. 5 due to the weight of the cable or the like. When the stepped portion is a convex portion, the spring 35 is compressed and the support shaft 26 is retracted into the frame 25, whereas in a concave portion, the spring 35 is extended and the support shaft 26 protrudes outward from the frame 25.
Thereby, the ring-shaped main body 1 is always held in a fixed position.

Furthermore, as shown in FIG. 5, this shock-absorbing guide roller 24 is rotatable around a support shaft 26, and the column body 28 is also pivotally supported by a pin 29. When the direction of the force is eccentric or curved, the roller 31 of the guide roller 24 rotates in accordance with the inner curved surface of the sheath tube 40, and retraction is performed smoothly.

(Effect of the invention) This invention has the above-mentioned configuration, and includes a ring-shaped main body 1
Since the structure is such that an arm with a movably supported short tube at its inner end is detachably fixed to an appropriate location on the outer periphery of the spacer, the spacer can be assembled at the site where the conduit is drawn into the sheath tube. Therefore, arms and short tubes can be prepared according to the diameter, number, and arrangement of the multiple pipes to be drawn in, and one end of each arm can be arranged on the outer periphery of the ring-shaped main body. By easily attaching the spacer of this invention to each fixed length of the multi-stranded conduit, it is possible to smoothly insert the conduit from one end of the sheath pipe to the other while maintaining the arrangement of the multi-stranded conduit. . In addition, each short tube into which multiple tubes are inserted and fixed is movably supported at the tip of each arm, so the ring-shaped main body tilts with respect to the tube at curved parts of the sheath tube. The ring-shaped main body moves to follow the bending of the sheath pipe, allowing smooth passage of the pipe. In addition, the ring-shaped main body is supported by shock-absorbing guide rollers, so even if there are steps at the connections of the sheath pipes, these guide rollers absorb these steps and allow stable transport through the pipe. .

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing the spacer of this invention inserted into the sheath tube, Fig. 2 is a partially exploded perspective view of the short tube, long arm, and ring-shaped main body of this invention, and Fig. 3 is a partially exploded perspective view of the spacer of this invention. FIG. 4 is a cross-sectional view showing how the long arm of the invention is attached to the ring-shaped body, FIG. 4 is a perspective view showing how the short tube and arm of this invention are attached to the ring-shaped body, and FIGS. 5A and B are respectively A schematic front view and a schematic side view showing the state in which the shock-absorbing guide roller is attached to the ring-shaped main body of this invention,
FIG. 6 is a side cross-sectional view showing a state in which a conduit is inserted into a sheath tube using the spacer of this invention. In the figure, 1 is a ring-shaped main body, 2 is a long arm, and 3 is a ring-shaped main body.
1 is a U-shaped locking part, 5 is a key-shaped action piece, 6 is a tightening bolt, 12 is a grip piece, 14 is a short tube, 15 is a spherical protrusion, 18 is an arm, 19 is a grip piece, 21 is a short tube ,
22 is a spherical protrusion, 24 is a shock absorbing roller, 3
1 is a roller, 40 is a sheath tube, and 41 is a conduit.

Claims (1)

[Scope of utility model registration request] One end of a plurality of arms is removably fixed to the periphery of a ring-shaped main body at intervals, and the other end of each arm located inside the main body has a multi-threaded tube for incorporating a cable. The short tube is supported by a support section provided on the outer periphery of the short tube for inserting and holding the tube, and is supported so as to be able to swing forward, backward, left, and right. A moving spacer for holding a conduit, characterized by having a shock-absorbing guide roller.